RedHat: Update makesrpm.pl to use @PACKAGE_VERSION@ instead of @VERSION@

RedHat: Update makesrpm.pl to use @PACKAGE_VERSION@ instead of @VERSION@

Commit 2f2c2ce62aa17ecac3651d64c1168af926f7458b
'Remove automake autoconf vars' replaced the automake variable @VERSION@
with the autoconf variable @PACKAGE_VERSION@. (Gerrit #13357)

The RedHat openafs.spec.in is not processed using autoconf, but
by 'makesrpm.pl', which was not updated to use @PACKAGE_VERSION@.

Update makesprm.pl to use @PACKAGE_VERSION@ instead of @VERSION@

Reviewed-on: https://gerrit.openafs.org/13887
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Michael Meffie <mmeffie@sinenomine.net>
Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>
(cherry picked from commit b03f3e6101ff21a6f148c555c213c47678482a7b)

Change-Id: I6bc27474b1b8dfa8b63806a4e0e996a00dd302e4
Reviewed-on: https://gerrit.openafs.org/14050
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Michael Meffie <mmeffie@sinenomine.net>
Reviewed-by: Stephan Wiesand <stephan.wiesand@desy.de>